mainwindow.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "mainwindow.h"
 #include "piecesmodel.h"
 #include "puzzlewidget.h"

 #include <QtWidgets>
 #include <stdlib.h>

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
     setupMenus();
     setupWidgets();
     model = new PiecesModel(puzzleWidget->pieceSize(), this);
     piecesList->setModel(model);

     setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
     setWindowTitle(tr("Puzzle"));
 }

 void MainWindow::openImage()
 {
     const QString directory =
         QStandardPaths::standardLocations(QStandardPaths::PicturesLocation).value(0, QDir::homePath());
     QFileDialog dialog(this, tr("Open Image"), directory);
     dialog.setAcceptMode(QFileDialog::AcceptOpen);
     dialog.setFileMode(QFileDialog::ExistingFile);
     QStringList mimeTypeFilters;
     for (const QByteArray &mimeTypeName : QImageReader::supportedMimeTypes())
         mimeTypeFilters.append(mimeTypeName);
     mimeTypeFilters.sort();
     dialog.setMimeTypeFilters(mimeTypeFilters);
     dialog.selectMimeTypeFilter("image/jpeg");
     if (dialog.exec() == QDialog::Accepted)
         loadImage(dialog.selectedFiles().constFirst());
 }

 void MainWindow::loadImage(const QString &fileName)
 {
     QPixmap newImage;
     if (!newImage.load(fileName)) {
         QMessageBox::warning(this, tr("Open Image"),
                              tr("The image file could not be loaded."),
                              QMessageBox::Close);
         return;
     }
     puzzleImage = newImage;
     setupPuzzle();
 }

 void MainWindow::setCompleted()
 {
     QMessageBox::information(this, tr("Puzzle Completed"),
                              tr("Congratulations! You have completed the puzzle!\n"
                                 "Click OK to start again."),
                              QMessageBox::Ok);

     setupPuzzle();
 }

 void MainWindow::setupPuzzle()
 {
     int size = qMin(puzzleImage.width(), puzzleImage.height());
     puzzleImage = puzzleImage.copy((puzzleImage.width() - size) / 2,
         (puzzleImage.height() - size) / 2, size, size).scaled(puzzleWidget->imageSize(),
             puzzleWidget->imageSize(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);

     model->addPieces(puzzleImage);
     puzzleWidget->clear();
 }

 void MainWindow::setupMenus()
 {
     QMenu *fileMenu = menuBar()->addMenu(tr("&File"));

     QAction *openAction = fileMenu->addAction(tr("&Open..."), this, &MainWindow::openImage);
     openAction->setShortcuts(QKeySequence::Open);

     QAction *exitAction = fileMenu->addAction(tr("E&xit"), qApp, &QCoreApplication::quit);
     exitAction->setShortcuts(QKeySequence::Quit);

     QMenu *gameMenu = menuBar()->addMenu(tr("&Game"));

     gameMenu->addAction(tr("&Restart"), this, &MainWindow::setupPuzzle);
 }

 void MainWindow::setupWidgets()
 {
     QFrame *frame = new QFrame;
     QHBoxLayout *frameLayout = new QHBoxLayout(frame);

     puzzleWidget = new PuzzleWidget(400);

     piecesList = new QListView;
     piecesList->setDragEnabled(true);
     piecesList->setViewMode(QListView::IconMode);
     piecesList->setIconSize(QSize(puzzleWidget->pieceSize() - 20, puzzleWidget->pieceSize() - 20));
     piecesList->setGridSize(QSize(puzzleWidget->pieceSize(), puzzleWidget->pieceSize()));
     piecesList->setSpacing(10);
     piecesList->setMovement(QListView::Snap);
     piecesList->setAcceptDrops(true);
     piecesList->setDropIndicatorShown(true);

     PiecesModel *model = new PiecesModel(puzzleWidget->pieceSize(), this);
     piecesList->setModel(model);

     connect(puzzleWidget, &PuzzleWidget::puzzleCompleted,
             this, &MainWindow::setCompleted, Qt::QueuedConnection);

     frameLayout->addWidget(piecesList);
     frameLayout->addWidget(puzzleWidget);
     setCentralWidget(frame);
 }